Denim/linen textures: waves/banding (?)

[#1]

Hi all,

Relatively new to Lightroom, been using it about a year. I shoot black and white mainly.

I am currently just exporting some of my photos for print to put in an exhibition. Something weird is happening with the textures of denim clothing when I export. 

This happens on various pictures, usually on denim clothing but I have seen it happen on linen also. It's like there is banding and where the thread petterns of denim or linen get pretty intense, they are rendered as larger wavy lines. It happens whether I export in JPEG, PNG of TIFF, but improves/disappears when I zoom in to the photo. It is the same when the exported image is viewed on my iphone. The screenshot below is an export in TIFF.

What is going on with this picture? Is it how I have edited the photo? My equiment (Sony A7iii)? Or is it just how Windows/my gpu/my screen is rendering the photo (in which case, should it be alright when I come to print)?

Any knowledge on this is much appreciated, and if I need to, how I can fix it.

Specs in case these help: Sony A7iii, Sony FE 50mm f1.8; Lightroom Classic v9.3; Windows 10 x64; GPU: nvidia RTX 2070.

Photo: shot in RAW, exported in 16bit uncompressed TIFF, profile: adobe monochrome, colour space adobe RGB, 300ppi.

Let me know if there is anything else I need to provide. Hopefully it is just my screen being annoying/me overreacting.

Thanks

Peter

[#2]

Hi all,

Relatively new to Lightroom, been using it about a year. I shoot black and white mainly.

I am currently just exporting some of my photos for print to put in an exhibition. Something weird is happening with the textures of denim clothing when I export. 

This happens on various pictures, usually on denim clothing but I have seen it happen on linen also. It's like there is banding and where the thread petterns of denim or linen get pretty intense, they are rendered as larger wavy lines. It happens whether I export in JPEG, PNG of TIFF, but improves/disappears when I zoom in to the photo. It is the same when the exported image is viewed on my iphone. The screenshot below is an export in TIFF.

What is going on with this picture? Is it how I have edited the photo? My equiment (Sony A7iii)? Or is it just how Windows/my gpu/my screen is rendering the photo (in which case, should it be alright when I come to print)?

Any knowledge on this is much appreciated, and if I need to, how I can fix it.

Specs in case these help: Sony A7iii, Sony FE 50mm f1.8; Lightroom Classic v9.3; Windows 10 x64; GPU: nvidia RTX 2070.

Photo: shot in RAW, exported in 16bit uncompressed TIFF, profile: adobe monochrome, colour space adobe RGB, 300ppi.

Let me know if there is anything else I need to provide. Hopefully it is just my screen being annoying/me overreacting.

Thanks

Peter

[#3]

[#4 · Accepted solution]

Moiré Patterns probably

https://photographylife.com/what-is-moire

https://www.dpmag.com/how-to/tip-of-the-week/fixing-moire-in-lightroom/

[#5]

That looks like what I'm suffering from. Thank you so much.

I did attach the photo at the bottom but will insert from now on.